cuneiform crashes on x64 in v0compev.c:ev_vector_cnt()

[Dmitry Katsubo]

I have segfault under unknown conditions on x64 platform for Cuneiform 1.1.0.

In my case it seems that "ep" pointer in memory range
7ffff049d000-7ffff0501000 rw-p 00000000 00:00 0
was incremented until it reached this area:
7ffff0501000-7ffff0521000 r-xp 00000000 fd:06 120221 /usr/lib64/libleo32.so.1.1.0
and write operation *ep++=... caused segfault.

See attaches for more details.